Re: Daylight Savings Time

On Friday 21 April 2006 05:47 pm, Tom Lane <tgl@sss.pgh.pa.us> thus
communicated:
--> Terry Lee Tucker <terry@esc1.com> writes:
--> > I need to know if there is a convienient way of establishing whether
 DST is --> > active within a function dealing with adjusting timestamps to
 other time --> > zones. The problem is that if I have the following
 timestamp:
--> > '04/21/2006 17:05 EDT'
--> > and I use the timezone() function in the following manner:
--> > return (timezone ('CST', '04/21/2006 17:05 EDT')
--> > I get a two hour difference in time.
-->
--> Perhaps you should be using a DST-aware timezone specification?  Since
--> 8.1 you could do
-->
--> regression=# select timezone ('CST6CDT', '04/21/2006 17:05
 EDT'::timestamptz); -->       timezone
--> ---------------------
-->  2006-04-21 16:05:00
--> (1 row)
-->
-->
-->             regards, tom lane
-->
Thanks for the reply Tom. We will be upgrading to version 8.x hopefully in
August. I can implement a work around until then. So, when we can upgrade, we
will change the timezone specification in the customer profiles to the
DST-aware specification, and we will be set.